>>11612090Maybe your brainu released so much happi chemicals at that day that it couldnt make more in this time. I am joking, that would only happen if you took mdma. What's more likely is you got sad (maybe because of stress of doing nothing) - > got stressed - > get bad thought - > more stressed - > bad thoughts make you feel even worse - > more stress - > next days still feel bad
Obviously is impossible to give you a correct answer with such few info but this is likely.